Engine Update

This update addresses a major issue in the stability and performance of the procedural generator. There was a flaw in the way memory management was being handled in the procedural map generator and it should now be possible to generate medium and large sized maps without crashing the game. 

Note that generating large maps still takes a significant amount of time, especially generating large sized maps with the maximum number of settlements is still unstable and could take upwards of a hour depending on your computer hardware. Although there are significant speed ups if you have a multi-core processor as the engine is designed to take advantage of multi-threading when computing NPC paths on the world map. 

In a future update I may look into possible further speed ups and computing efficiency of the procedural generator as a whole. 

-K